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二点五乘零点七乘零点四的简便方法运算

2.5×0.7×0.4 =2.5×0.4×0.7 =1×0.7 =0.7

解: 原式=0.3×(2.5×0.4) =0.3×1 =0.3

2.4x0.25 =0.6x4x0.25 =0.6x1 =0.6

原式 =1.25x4x0.48x2.5 =(1.25x0.48)x(4x2.5) =(1.25...

=24x0.4+75x0.4+0.4 =(24+75+1)x0.4 =100x0.4 =40

4.25÷2.5×9.9+0.17 =1.7×9.9+0.17 =0.17×99+0.17 =...

二点五乘以小括号三点五减1.65小括号乘零点四怎么简便计算 2.5×(3.5-1.65)×0.4 ...

1.5×4/5+0.8×6.5+2×4/5 =1.2+5.1+8/5 =6.3+1.6 =7.9

0.48×2.5×12.5 =(0.6×2.5)×(12.5×0.8) =1.5×10 =15...

解此题 8x2.5x1.25x0.4=(8x1.25)x(2.5x0.4)=...

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